GATE Practice Question and Answer

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Answer : 1. "131 calls"
Explanation :

Answer: A) 131 calls Explanation: 1st supporter recieve 440 calls 2nd supporter recieve 360 calls 3rd supporter recieve 300 calls So total calls = 1100 calls ; Calls this month= 1500 So remaining calls to be distributed is 400 So Now Ratio 1st:2nd:3rd ==> 440:360:300=> 22:18:15 Now No. of More Calls 2nd supporter will get => [18/(22+18+15)] x 400=> (18/55) x 400 => 131 CallsSo 131 more Calls than last month.

Q: photosynthesis takes place faster in 1804 0

  • 1
    darkness
    Correct
    Wrong
  • 2
    red light
    Correct
    Wrong
  • 3
    white light
    Correct
    Wrong
  • 4
    yellow light
    Correct
    Wrong
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Answer : 3. "white light"
Explanation :

Answer: C) white light Explanation: As far as the rate of photosynthesis is concerned, it is fastest in white light making the rate of photosynthesis maximum. After White, We Have Violet Light Where Photosynthesis Occur To A Higher Extent as It Has The Shortest Wavelength Hence Has The Max Energy.   So The Order Is  ::  white>violet>blue.

Q: The total simple interest earned on a sum of money increases by Rs. 600 when the rate of interest increases by 2% per annum. If the investment was made for 5 years, find the sum of money that was invested ? 1803 0

  • 1
    Rs. 6000
    Correct
    Wrong
  • 2
    Rs. 5550
    Correct
    Wrong
  • 3
    Rs. 7500
    Correct
    Wrong
  • 4
    Rs. 6580
    Correct
    Wrong
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Answer : 1. "Rs. 6000"
Explanation :

Answer: A) Rs. 6000 Explanation: Let the sum invested be Rs. P Let the rate of interest be R% per annum => Interest earned for 5 years = (P x 5 x R/100) = PR/20 Now, given that the interest earned increased by Rs. 600 if the Rate increased to (R+2)% => SI = (P x 5 x (R+2))/100 = PR/20 + 10P/100 Hence, PR/20 + 10P/100 = PR/20 + 600 => P = 6000 Therefore, the sum invested is Rs. 6000

Q: 24 S in an IF? 1803 0

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Answer :
Explanation :

24 S in an IF means 24 Spokes in an Indian Flag.

Q: How many three digit numbers 'abc' are formed where two of the three digits are same ? 1803 0

  • 1
    252
    Correct
    Wrong
  • 2
    648
    Correct
    Wrong
  • 3
    243
    Correct
    Wrong
  • 4
    900
    Correct
    Wrong
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Answer : 3. "243"
Explanation :

Answer: C) 243 Explanation: Digits are 0,1,2,3,4,5,6,7,8,9. So no. of digits are 10   First all possible case => 9(0 excluded) x 10 x 10 = 900   Second no repetition allowed =>9 x 9 x 8 = 648   Third all digits are same => 9 (111,222,333,444,555,666,777,888,999)   Three digit numbers where two of the three digits are same = 900 - 648 - 9 = 243 ;

Q: Which of the following elements is a metal? 1803 0

  • 1
    Se
    Correct
    Wrong
  • 2
    I
    Correct
    Wrong
  • 3
    Zn
    Correct
    Wrong
  • 4
    S
    Correct
    Wrong
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Answer : 3. "Zn"
Explanation :

Answer: C) Zn Explanation: In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic bonds. Metals are opaque, lustrous elements that are good conductors of heat and electricity. Most metals are malleable and ductile and are, in general, denser than the other elemental substances.   Examples of metals are aluminium, copper, iron, tin, gold, lead, silver, titanium, uranium, and zinc.   Here Se - Selenium is an element but is not a metal, S - Sulphur is not a metal and I - Iodine is also not a metal.   Hence, Zn - Zinc is the only metal in the given options.

Q: Where are Maglev trains used? 1803 0

  • 1
    London
    Correct
    Wrong
  • 2
    Russia
    Correct
    Wrong
  • 3
    Germany
    Correct
    Wrong
  • 4
    Japan
    Correct
    Wrong
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Answer : 4. "Japan"
Explanation :

Answer: D) Japan Explanation: Maglev trains are used in Japan, South Korea and China only. Maglev derived from magnetic levitation using the principle of magnetic repulsion is a system of train transportation that uses two sets of magnets, one set to repel and push the train up off the track as in levitation then another set to move the 'floating train' ahead at great speed taking advantage of no friction. Maglev trains are therefore quieter and smoother than conventional trains, and have the potential for much higher speeds Despite over a century of research and development, maglev transport systems are in operation in just three countries Japan, South Korea and China.   Hence Maglev -- Magnetic-levitation.

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Answer : 2. "Both a & b follows"
Explanation :

Answer: B) Both a & b follows Explanation: Enforcing a penalty will motivate people to pay the bills. So, course of action a follows.It is general tendency to act accordingly when a penalty clause slapped. So, course of action b follows.

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